Hello, I hope someone can help. I recently opened a new account an an trading website: Poloniex.com. Before this, I only made an account for Bitcoins using a immediate card purchase and kept it all on a online wallet. Yesterday, I made a withdrawal from the wallet into my Poloniex account and paid all the fees etc. And today I checked, the wallet is empty. And I checked my Poloniex and the amount it there. BUT this is the problem:

When I checked the address I sent to, the blockchain shows that all the money I sent there is GONE, sent to someone else. I have sent a support to stop it before confirmation but does anyone know what I can do?